Heel cushion



FIG. 1 is a top, front, and inner-side isometric view of a heel cushion showing my new design;

FIG. 2 is a top, rear, and outer-side isometric view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is an outer-side elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a front elevation view thereof;

FIG. 7 is a bottom plan view thereof; and

FIG. 8 is an inner-side elevation view thereof. 

CLAIM The ornamental design for a heel cushion as shown and described. 